Little contribution back,,Bearing size for the 6500,Main Gear Pinion #244,id 8.80mm x od19.72mm x 6.10mm
L/side Plate Bearing,,id 8.80mm x od 16.58mm x 3.73
R/side Plate Bearing,,id 8.80mm x od 16.58mm x 3.73
Little heads up,I bought 2 of these off a friend 2 years ago he only use them 2 times,last season I use them maybe on 5 trips,could not believe the salt and Bearing corrosion,had to replace all the Bearing in both reels,open Bearing with very little grease,not much protection were the handle screw into the side plate,I had to really pack the side plate with grease to seal it from salt air and water,,,hope this help